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Supplemental Financial Information - Accounts Payable (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Accounts payable trade | $ 389 | $ 265
Salaries, withholdings and payroll taxes | 437 | 400
Ticket taxes and fees | 278 | 302
Aircraft maintenance payable | 31 | 140
Fuel payable | 55 | 161
Dividends payable | 0 | 107
Third party services | 123 | 269
Other payable | 205 | 218
Accounts payable | $ 1,518 | $ 1,862

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